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From GitBox <...@apache.org>
Subject [GitHub] yanghua commented on a change in pull request #6432: [FLINK-9970] [table] Add ASCII/CHR function for table/sql API
Date Tue, 16 Oct 2018 01:19:49 GMT
yanghua commented on a change in pull request #6432: [FLINK-9970] [table] Add ASCII/CHR function
for table/sql API
URL: https://github.com/apache/flink/pull/6432#discussion_r225367314
 
 

 ##########
 File path: flink-libraries/flink-table/src/main/scala/org/apache/flink/table/runtime/functions/ScalarFunctions.scala
 ##########
 @@ -252,6 +252,17 @@ object ScalarFunctions {
     regexp_extract(str, regex, 0)
   }
 
+  /**
+    * Returns a numeric value of the leftmost character of the string str.
+    */
+  def ascii(str: String): Integer = {
+    if (str == null || str.equals("")) {
+      0
+    } else {
+      str.charAt(0).toByte.toInt
 
 Review comment:
   I think it's OK.

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